CN1133306C - High frequency radio signal receiving device for digit communication - Google Patents
High frequency radio signal receiving device for digit communication Download PDFInfo
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- CN1133306C CN1133306C CN97102565.7A CN97102565A CN1133306C CN 1133306 C CN1133306 C CN 1133306C CN 97102565 A CN97102565 A CN 97102565A CN 1133306 C CN1133306 C CN 1133306C
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
Abstract
A high-frequency radio signal receiving apparatus for digital communication includes a receiving antenna for receiving a high-frequency radio wave, a frequency converter for converting a signal supplied from the receiving antenna through a wide-band bandpass filter into a signal of an intermediate frequency band, an impulsive noise detecting unit for detecting impulsive noise on the basis of a signal outputted from the frequency converter. The apparatus further includes an impulsive noise correcting unit for correcting the signal outputted from the frequency converter in dependence on a signal outputted from the impulsive noise detecting unit, and a demodulating unit for demodulating a signal outputted from the impulsive noise correcting unit and supplied by way of a narrow-band bandpass filter.
Description
Technical field
Present invention relates in general to a kind of for example high frequency radio signal receiving device of satellite communication etc. of digital communication that is used for.More particularly, the present invention relates to a kind of high frequency radio signal receiving device that can exempt for example noise effect of impact noise (below be also referred to as the high frequency radio signal receiver).
Background technology
In order to understand the present invention better, at first at present known or conventional high frequency radio signal receiver is described with reference to accompanying drawing 7, Fig. 7 has shown the block diagram of the general structure of this receiver.In the drawings, label 1 expression reception antenna, 2 expression broadband band-pass filters (below be also referred to as broadband BPF), frequency converter of 3 expressions, narrow band filter of 4 expressions (below be also referred to as arrowband BPF), demodulator of label 5 expressions.
Utilize above-mentioned structure, this high frequency radio signal receiver is worked in the following manner.
Referring to Fig. 7, receive radio wave signal from reception antenna 1, the signal of reception is sent to the signal that frequency converter 3 converts a suitable Mid Frequency to by broadband BPF2.Pass through arrowband BPF4 from the signal of frequency converter 3 outputs, thereby, have only required signal to be removed and carry out demodulation by demodulator 5.
By being used of broadband BPF2 and arrowband BPF4, the signal component of the unwanted frequency outside the frequency that is used to receive is removed.In other cases, in the situation of the high frequency radio receiver that is used for MOVING STRUCTURE, arrowband BPF4 is indispensable, so that guarantee effectively utilizing of frequency range.
In the high frequency radio signal receiver of routine, when the disturbing wave in the signal of the frequency band that is blended in reception when for example impact noise is received antenna 1 and receives, problem described below has appearred.Illustrate in passing that term " impact noise " is meant to have the extremely short duration of 10-100 μ s and have higher power or the noise of energy level.Source as for producing this noise comprises transportation facility, industrial electrical equipment/electronic equipment, electrical power transmission system, motor vehicles or the like.Sometimes, impact noise is also referred to as city noise.
Here, should be noted that, above-mentioned impact noise can not be eliminated by means of broadband BPF2 and arrowband BPF4, and the duration of impact noise can be elongated in the processing procedure that arrowband BPF4 carries out, and therefore causes the loss of inherent or required signal component.
Because this situation, conventional high frequency radio signal receiver has produced serious problem, that is, because the intervention of impact noise, receiving ratio of error increases, and has so just caused the decline or the loss of receiver communication capacity on the whole.
In order to solve the above problems, cooperate demodulator 5 to adopt the logical circuit that is used for bit error correction.But the structure of this logical circuit is quite complicated, and volume is bigger.Owing to this reason, can produce great inconvenience when in portable and/or mobile device, this logical circuit being installed.In addition, adopt logical circuit also can increase the production cost of the high frequency radio signal receiver that is used for digital communication.
Summary of the invention
Consider the above-mentioned state of the art, purpose of the present invention just provides a kind of high frequency radio signal receiving device that is used for digital communication, and it can eliminate the influence of impact noise effectively.
More particularly, one object of the present invention just provides a kind of high frequency radio signal receiving device that is used for digital communication, no matter whether impact noise is received the increase that can both prevent to receive error rate for it, and can produce with lower cost with simple structure.
The above-mentioned purpose with other will be more obvious by the narration of back, according to a first aspect of the invention, provides a kind of high frequency radio signal receiving device that is used for digital communication, comprises a reception antenna that is used to receive the high frequency radio wave signal; A conversion of signals that is used for providing from reception antenna becomes the frequency converter of Mid Frequency signal; An impact noise checkout gear is used for according to the input impact noise from frequency converter output; An impact noise means for correcting is used for the signal of exporting from frequency converter according to from the signal correction of impact noise checkout gear output; A demodulating equipment that is used for the signal demodulation of exporting from the impact noise means for correcting; Described impact noise means for correcting comprises a multiplexed type three-terminal switch, has first end as the input of the signal of exporting from frequency converter, second end as the output of impact noise means for correcting, the 3rd end with a ground connection, wherein, when the signal of the detection of indication impact noise when the impact noise detector is exported, second end of the multiplexed type three-terminal switch of impact noise means for correcting is connected to described the 3rd end.
According to another aspect of the present invention, a kind of high frequency radio signal receiving device that is used for digital communication is provided, comprise, a reception antenna that is used to receive the high frequency radio wave signal, a conversion of signals that is used for receiving from reception antenna becomes the frequency converter of Mid Frequency signal, an impact noise detector, be used for according to input impact noise from frequency converter output, an impact noise correcting unit, be used for according to signal from the signal correction of impact noise detector output from frequency converter output, and a demodulator that is used for the signal demodulation that provides from the output of impact noise correcting unit and by narrow band filter.
Utilize the structure that is provided with of above-mentioned high frequency radio signal receiving device, be imported into data demodulator before by of the detection of impact noise detector according to received signal to noise, impact noise can be proofreaied and correct effectively by the impact noise correcting unit, thereby, prevented to receive the increase of error rate.Therefore, can prevent the loss of the communication capacity or the performance of high frequency radio signal receiving device, and have great advantage,
In the pattern of carrying out the best of the present invention, the impact noise correcting unit can comprise an on/off type two-terminal switch and an attenuator, be used for signal being decayed according to the operation of on/off type two-terminal switch, make the signal that detects impact noise when indication by when the impact noise detector export, thereby the on/off type two-terminal switch of impact noise correcting unit is opened the signal that permission exports from frequency converter and is decayed by attenuator.Because above-mentioned structure; according to the detection of impact noise detector impact noise, impact noise can be decayed by the impact noise correcting unit, thereby can prevent to receive the increase of error rate; and the decline of the communication capacity of high frequency radio signal receiving device, not normal or loss.
In carrying out another optimal mode of the present invention, the impact noise correcting unit can comprise a multiplexed type three-terminal switch, has first end as the input of the signal of exporting from frequency converter, second end as the output of impact noise correcting unit, the 3rd end with a ground connection, when the signal of the detection of indication impact noise when the impact noise detector is exported, second end of the multiplexed type three-terminal switch of impact noise correcting unit is closed or is connected to the 3rd end.Utilize above-mentioned structure, the detection of the impact noise of doing according to noise detector, impact noise can be eliminated by the impact noise correcting unit or suppress basically is 0, thereby noisiness can be significantly reduced, this means when inherent or for example received data-signal of being concerned about of main signal have lower incoming level, can prevent to receive the increase of error rate.Therefore, though come to the faint situation of radio signal under, the communication capacity of high frequency radio signal receiving device can be guaranteed.
In carrying out another pattern of the present invention, high frequency radio signal receiving device can further comprise a delay circuit, is used for before signal is sent to the impact noise correcting circuit, and the signal from frequency converter output is postponed.Because such arrangement, delay in response to the impact noise detector can be compensated, thereby resident noise contribution also can be suppressed to 0 basically, otherwise, because the delay in the operation of impact noise detector is even these resident noise contributions still may exist after the correction of being carried out by the impact noise correcting unit.Therefore, can prevent the increase of the acceptance error rate of high frequency radio signal receiving device more reliably.In addition, because the inhibition of resident impact noise composition after proofreading and correct, does not have harmful spike noise to be present in the demodulated data signal basically.In addition, above-mentioned structure also can cheap undersizedly need not circuit element high pressure resistant or load and realizes by adopting.Therefore, can realize a kind of high frequency radio signal receiving device of undersized or miniaturization of cheapness.
In carrying out another pattern of the present invention, the impact noise detector can comprise an envelope detector, be used to detect envelope from the signal of frequency converter output, an average incoming level detector, be used to detect average incoming level from the signal of envelope detector output, a comparator is used for detecting impact noise by two signals exporting from envelope detector and average incoming level detector more respectively.According to the structure of above-mentioned impact noise detector, the benchmark that average incoming level can be used as comparison adopts.Because this structure, this high frequency radio signal receiving device goes for the incoming level of wide dynamic range, thereby this high frequency radio signal receiving device has the ability of enhancing for the detection of impact noise.
In carrying out another pattern of the present invention, this high frequency radio signal receiving device may further include a waveform shaper, be used for signal shaping from the output of impact noise detector, a pulse width measurement circuit, be used to measure pulse duration from the digital signal of waveform shaper output, a determining unit, be used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output, a message elements is used to notify the result who determines who is undertaken by determining unit.Utilize above-mentioned structure, make operator or user can obtain the information of the reliability of the relevant data that receive.
In other words, according to above-mentioned message or information, the user can send one and be used to resend data or his or she dot command or request with may changing reception, thereby the data that receive come further to have strengthened reliability on the whole.
Description of drawings
Above-mentioned purpose with other of the present invention, feature and advantage in conjunction with the drawings will be easier to understand to the description of its most preferred embodiment.
In the description process below, with reference to accompanying drawing, wherein:
Fig. 1 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of first embodiment of the invention;
Fig. 2 is the block diagram of demonstration according to the overall circuit structure of the high frequency radio signal receiving device that is used for digital communication of second embodiment of the invention;
Fig. 3 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of third embodiment of the invention;
Fig. 4 A-4G is for showing the oscillogram of the waveform signal that the circuit block that is used for the high frequency radio signal receiving device of digital communication according to the present invention is exported;
Fig. 5 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of fourth embodiment of the invention;
Fig. 6 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of fifth embodiment of the invention;
Fig. 7 has shown the block diagram of the structure of the conventional high frequency radio signal receiving device that is used for digital communication.
Embodiment
Below with reference to the accompanying drawings, describe the present invention in detail in conjunction with most preferred embodiment, wherein identical label is represented identical parts in all figure.
Embodiment 1
Fig. 1 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of first embodiment of the invention.In Fig. 1, label 1 expression reception antenna, 2 expression broadband band-pass filters (below be also referred to as broadband BPF), frequency converter of 3 expressions, narrow band filter of 4 expressions (below be also referred to as arrowband BPF), demodulator of label 5 expressions, impact noise detector of 6 expressions, impact noise correcting unit of 7 expressions.As shown in Figure 1, impact noise correcting unit 7 comprises an attenuator 8 of being made up of resistance and on/off type two-terminal switch 9.
As can be seen from the figure, reception antenna 1 is connected to frequency converter 3 by broadband BPF2.The output of frequency converter 3 is imported into impact noise detector 6 and impact noise correcting unit 7.On the other hand, the output of impact noise detector 6 is connected to the gate control signal input (not shown) of impact noise correcting unit 7, its output is connected to the input of arrowband BPF4 conversely, and the output of arrowband BPF4 is connected to the input of demodulator 5.
Be described in the operation of the high frequency radio signal receiving device that is used for digital communication of aforesaid structure below with reference to Fig. 4 A-4G, Fig. 4 A-4G is for showing the oscillogram according to the waveform signal of the circuit block output of the high frequency radio signal receiving device that is used for digital communication according to the present invention, is about the high frequency radio signal receiving device of the embodiment present according to the present invention in the signal waveform shown in Fig. 4 A-4D wherein.
Referring to Fig. 1, and Fig. 4 A-4D, the signal that provides from reception antenna 1 based on the reception of waveform signal is imported into broadband BPF2, and wherein, unusual or undesirable signal component is removed.Carry out frequency inverted from the signal of broadband BPF2 output by frequency converter 3, become the Mid Frequency signal.Like this, the signal waveform that provides from reception antenna 1 shown in Fig. 4 A, from the signal waveform of frequency converter 3 outputs shown in Fig. 4 B.As can be seen, impact noise composition contained from the signal that reception antenna 1 provides is still kept intact in the output of frequency converter 3 from these oscillograms.In other words, comprise reception antenna 1, in the present relevant operation of the circuit of broadband BPF2 and frequency converter 3, between the high frequency radio signal receiver of high frequency radio signal receiver according to the present invention and routine, do not having too big difference.
In impact noise correcting unit 7, as long as from the gate signal of impact noise detector 6 outputs is logical zero, there is not the impact noise composition in indication, and on/off type two-terminal switch 9 remains on closure or conducting state, thereby is sent to arrowband BPF4 from the signal that frequency converter 3 provides.On the contrary, when gate signal was logical one, there was the impact noise composition in indication in the signal of frequency converter 3 output, the on/off type two-terminal switch 9 of impact noise correcting unit 7 be opened (disconnection), as a result, the compulsory attenuator 8 that passes through of signal section that contains the impact noise composition.Therefore, impact noise partly is attenuated and is provided to then arrowband BPF4.Be shown in Fig. 4 D from the waveform of the signal of the decay of impact noise correcting unit 7 output.
Be provided to demodulator 5 from the signal of impact noise correcting unit 7 output by arrowband BPF4, resemble in the high frequency radio signal receiver of aforesaid routine by demodulation.
From aforementioned, understood, at the high frequency radio signal receiving device that is used for digital communication according to the present invention, fall into frequency acceptance band and be included in the disturbing wave of signal of reception that for example impact noise is can be by impact noise detector 6 detected and attenuator 8 decay--it constitutes the somes of impact noise correcting unit 7.Therefore, the adverse effect of impact noise can be inhibited, thereby, prevented to receive the increase or the deterioration of error rate.
Fig. 2 is the block diagram of demonstration according to the overall circuit structure of the high frequency radio signal receiving device that is used for digital communication of second embodiment of the invention.According to the high frequency radio signal receiving device of this embodiment on the structure of impact noise correcting unit 7 with first embodiment in different.More particularly, in the situation according to the high frequency radio signal receiving device of second embodiment, impact noise correcting unit 7 comprises a multiplexed type three-terminal switch 10, it has one first end 10a, input as impact noise correcting unit 7, one second end 10b, output and one the 3rd end 10c as impact noise correcting unit 7 are connected to earth potential.Impact noise correcting unit 7 is like this configurations, the perhaps first end 10a, and perhaps the 3rd end 10c is selected by the second end 10b according to the gate signal that provides from impact noise detector 6.Except above-mentioned impact noise correcting unit 7, according to the high frequency radio signal receiving device of second embodiment basically with first embodiment in identical.Therefore, there is no need to be repeated in this description.
Referring to Fig. 2 and Fig. 4 E, the signal that provides from reception antenna 1 is after the processing through broadband BPF2 and frequency converter 3, carry out the impact noise detecting operation by impact noise detector 6, with identical in the high frequency radio signal receiving device of the first embodiment of the present invention.In impact noise correcting unit 7, as long as from the gate signal of impact noise detector 6 outputs is logical zero, there is not the impact noise composition in indication, the second end 10b of multiplexed type three-terminal switch 10 is closed into the first end 10a, thereby is sent to arrowband BPF4 from the signal that frequency converter 3 provides.On the contrary, when gate signal is logical one, there is the impact noise composition in indication in the signal of frequency converter 3 outputs, the second end 10b and the 3rd end 10c of multiplexed type three-terminal switch 10 are interconnected to together, the result, contain that the signal section of impact noise composition is compulsory to be diverted to ground, thereby the signal that contains the impact noise composition is dammed.Be shown in Fig. 4 E from the waveform of the signal that goes out of the impact noise correcting unit output that comprises multiplexed type three-terminal switch 10.
As what from noted earlier, understood, in the high frequency radio signal receiving device according to second embodiment, when impact noise detector 6 detects when having impact noise in the received signal, the input end grounding of the multiplexed type three-terminal switch 10 by will constituting impact noise correcting unit 7, impact noise can be eliminated.Therefore, the adverse effect of impact noise can be suppressed or be prevented energetically, thereby, prevented to receive the increase or the deterioration of error rate.
Fig. 3 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of third embodiment of the invention.As shown in Figure 3, be according to the high frequency radio signal receiving device of this embodiment and the difference among second embodiment, except the structure according to the second embodiment high frequency radio signal receiving device, a delay circuit 11 is provided between frequency converter 3 and the impact noise correcting unit 7.Except this difference, according to the high frequency radio signal receiving device of third embodiment of the invention substantially with second embodiment in identical.Therefore, below its difference will only be described.
Pass through the delay of a moment of impact noise detector 6 back experience from the signal of frequency converter 3 outputs, this delay is reflected in the delay of the response of impact noise compensation unit 7.Because this delay, impact noise correcting unit 7 can not be eliminated impact noise fully, causes some impact noise not to be corrected, as Fig. 4 D, shown in the 4E.
A third embodiment in accordance with the invention, the problems referred to above are solved.Referring to Fig. 3, the signal of exporting from frequency converter 3 is provided to impact noise detector 6 and delay circuit 11.The time delay that a moment is arranged as mentioned above by the signal component of impact noise detector 6.By studying this time delay, delay circuit 11 is to be provided with like this, and it can make to the signal delay that is sent to impact noise correcting unit 7 from frequency converter 3 because the moment time delay that impact noise detector 6 brings can be compensated.Therefore, impact noise correcting unit 7 can carry out signal processing in real time, thereby is included in all impact noise compositions from the signal of frequency converter 3 outputs, in response to the gate signal that provides from impact noise detector 6, can is corrected satisfactorily or eliminate.For example, the output waveform of impact noise correcting unit 7 is shown in Fig. 4 G.
Here, should say one, above-mentioned delay circuit 11 also can be used for the high frequency radio signal receiving device of first embodiment shown in Figure 1 with being equal to.
From foregoing description, be appreciated that, owing to have the structure that a delay corresponding to the time delay that is caused by impact noise detector 6 is sent to impact noise correcting unit 7 by delay circuit 11 from the signal of frequency converter 3 outputs, impact noise correcting unit 7 can be eliminated the impact noise composition satisfactorily, thereby can be energetically and prevent more reliably because the deterioration of the reception error rate that causes of impact noise.
Fig. 5 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of fourth embodiment of the invention.In the figure, envelope detector of label 12 expressions, be used to detect envelope waveform from the signal of frequency converter 3 outputs, average incoming level detector of label 13 expressions, be used to detect the average incoming level from the signal of envelope detector 12 outputs, comparator of label 14 expressions is used for more respectively from the signal of envelope detector 12 with average incoming level detector 13 outputs, thereby, detect the existence of impact noise.
As can be seen from Figure 5, impact noise detector 6 comprises an envelope detector 12 as mentioned above, average incoming level detector 13 and comparator 14.Therefore, this embodiment is relevant for circuit structure, and the front is in conjunction with the operation of the described impact noise detector 6 of the first and the 3rd embodiment.
Refer again to Fig. 5, in impact noise detector 6, the signal of exporting from frequency converter 3 carries out envelope detected by envelope detector 12, and the average level of exporting from envelope detector 12 is detected by average incoming level detector 13.On the other hand, comparator 14 will compare from the average level signal of average incoming level detector 13 outputs and the output signal of envelope detector 12.When the signal level from envelope detector 12 output surpasses from the mean value of average incoming level detector 13 outputs or level, then detect and have impact noise.Therefore, indicate the signal that detects impact noise to be provided to impact noise correcting unit 7.Explanation in passing, comparator 14 can be made of a differential amplifier or like, and average incoming level detector 13 can utilize the suitable low pass filter that is made of resistance and capacitor to realize.
By utilizing from the average level signal of average incoming level detector 13 outputs benchmark, even when incoming level changes, also can detect impact noise as the comparison of carrying out by comparator 14.In other words, the high frequency radio signal receiving device of a fourth embodiment in accordance with the invention can guarantee to have wider dynamic range.
Fig. 6 is the block diagram of demonstration according to the general structure of the high frequency radio signal receiving device that is used for digital communication of fifth embodiment of the invention.In the figure, waveform shaper of label 15 expressions, be used for the output signal shaping of impact noise detector 6, pulse width measurement circuit of label 16 expressions, be used to measure the pulse duration of the digital signal that after the output signal shaping of waveform shaper 15 impact noise detectors 6, obtains, definite circuit of label 17 expression, be used for according to the output signal of pulse width measurement circuit 16 make the relevant data that receive reliability determine alarm signal output ends of label 18 expressions.
As can be seen from Figure 6, the signal from 6 outputs of impact noise detector is shaped as a numeral or pulse signal by waveform shaper 15.Measure by pulse width measurement circuit 16 from the pulse duration of the digital signal of waveform shaper 15 output, and the signal of the measured pulse duration of indication is provided to and determines circuit 17.In response, determine that circuit 17 determines from the time span of the signal of pulse width measurement circuit 16 outputs, that is, and the existence of the impact noise that detects by impact noise detector 6 or the time that comprises.When this time span surpasses preset time, for example, 206 μ s (corresponding to of the transfer rate of 4800bps) determine that circuit 17 determines that the data reliabilities that receive are relatively poor.In this case, from alarm signal of alarm signal output ends 18 output, notify the lower reliability of the data that the user receives.
In response to the low reliability of the data that change the indication reception, the user can ask to resend data or move to any other the suitable method that receives these data under another place (when receiving equipment is used as a terminal installation) or the prerequisite in high reliability.
Therefore, although should be pointed out that and utilized an alarm signal to notify the user the relevant definite result who determines circuit 17, the information apparatus that other are suitable, for example optical diode or the like also can be used to visually report to the police, obtain identical effect basically.
Many feature and advantage of the present invention can draw from above detailed description significantly.Appended claims attempts to cover the feature and advantage that all fall into the spirit and scope of the present invention.In addition, for a person skilled in the art, can make various improvement or combination to it, therefore, the present invention is not limited to describe and shown structure and operation.
For example, also can be used for other the embodiment shown in Fig. 5 and 6 in conjunction with the described delay circuit of the high frequency radio signal receiving device shown in Fig. 3 for aforesaid identical purpose.
Therefore, all modification or equivalents that are fit to all are considered as falling into the spirit and scope of the present invention.
Claims (20)
1. a high frequency radio signal receiving device that is used for digital communication comprises,
A reception antenna that is used to receive the high frequency radio wave signal;
A conversion of signals that is used for providing from reception antenna becomes the frequency converter of Mid Frequency signal;
An impact noise checkout gear is used for according to the input impact noise from frequency converter output;
An impact noise means for correcting is used for the signal of exporting from frequency converter according to from the signal correction of impact noise checkout gear output;
A demodulating equipment that is used for the signal demodulation of exporting from the impact noise means for correcting;
Described impact noise means for correcting comprises a multiplexed type three-terminal switch, has as first end from the input of the signal of frequency converter output, and as second end of the output of impact noise means for correcting and the 3rd end of a ground connection,
Wherein, when the signal of the detection of indication impact noise when the impact noise detector is exported, second end of the multiplexed type three-terminal switch of impact noise means for correcting is connected to described the 3rd end.
2. the high frequency radio signal receiving device that is used for digital communication according to claim 1,
Further comprise:
A delay circuit was used for before signal is sent to the impact noise means for correcting, and the signal from frequency converter output is postponed.
3. the high frequency radio signal receiving device that is used for digital communication according to claim 1,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
4. the high frequency radio signal receiving device that is used for digital communication according to claim 1,
Described impact noise checkout gear comprises:
An envelope detector is used to detect the envelope from the signal of frequency converter output;
An average incoming level detector is used to detect the average incoming level from the signal of envelope detected device output;
A comparator is used for detecting impact noise by two signals exporting from envelope detected device and average incoming level detector more respectively.
5. the high frequency radio signal receiving device that is used for digital communication according to claim 4,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
6. the high frequency radio signal receiving device that is used for digital communication according to claim 1,
The wherein said signal that provides from reception antenna passes through broadband band-pass filter earlier.
7. the high frequency radio signal receiving device that is used for digital communication according to claim 6,
Further comprise:
A delay circuit was used for before signal is sent to the impact noise means for correcting, and the signal from frequency converter output is postponed.
8. the high frequency radio signal receiving device that is used for digital communication according to claim 6,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
9. the high frequency radio signal receiving device that is used for digital communication according to claim 6,
Described impact noise checkout gear comprises:
An envelope detector is used to detect the envelope from the signal of frequency converter output;
An average incoming level detector is used to detect the average incoming level from the signal of envelope detected device output;
A comparator is used for detecting impact noise by two signals exporting from envelope detected device and average incoming level detector more respectively.
10. the high frequency radio signal receiving device that is used for digital communication according to claim 9,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
11. the high frequency that is used for digital communication according to claim 1 does not have signal of telecommunication receiving equipment,
Wherein said signal from the output of impact noise means for correcting passes through narrow band filter earlier.
12. the high frequency radio signal receiving device that is used for digital communication according to claim 11,
Further comprise:
A delay circuit was used for before signal is sent to the impact noise means for correcting, and the signal from frequency converter output is postponed.
13. the high frequency radio signal receiving device that is used for digital communication according to claim 11,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
14. the high frequency radio signal receiving device that is used for digital communication according to claim 11,
Described impact noise checkout gear comprises:
An envelope detector is used to detect the envelope from the signal of frequency converter output;
An average incoming level detector is used to detect the average incoming level from the signal of envelope detected device output;
A comparator is used for detecting impact noise by two signals exporting from envelope detected device and average incoming level detector more respectively.
15. the high frequency radio signal receiving device that is used for digital communication according to claim 14,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
16. the high frequency radio signal receiving device that is used for digital communication according to claim 1,
The wherein said signal that provides from reception antenna is earlier by broadband band-pass filter, and the described signal of exporting from the impact noise means for correcting passes through narrow band filter earlier.
17. the high frequency radio signal receiving device that is used for digital communication according to claim 16,
Further comprise:
A delay circuit was used for before signal is sent to the impact noise means for correcting, and the signal from frequency converter output is postponed.
18. the high frequency radio signal receiving device that is used for digital communication according to claim 16,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
19. the high frequency radio signal receiving device that is used for digital communication according to claim 16,
Described impact noise checkout gear comprises:
An envelope detector is used to detect the envelope from the signal of frequency converter output;
An average incoming level detector is used to detect the average incoming level from the signal of envelope detected device output;
A comparator is used for detecting impact noise by two signals exporting from envelope detected device and average incoming level detector more respectively.
20. the high frequency radio signal receiving device that is used for digital communication according to claim 19,
Further comprise:
A waveform shaper is used for the signal shaping from the output of impact noise checkout gear;
A pulse width measurement circuit is used to measure the pulse duration from the digital signal of waveform shaper output;
A definite device is used for determining according to the relevant reliability of the data of making reception from the signal of pulse width measurement circuit output;
An information apparatus is used to notify the result who determines by determining that device carries out.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03771996A JP3627349B2 (en) | 1996-02-26 | 1996-02-26 | High frequency receiver for digital communication |
| JP037719/1996 | 1996-02-26 | ||
| JP037719/96 | 1996-02-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1163527A CN1163527A (en) | 1997-10-29 |
| CN1133306C true CN1133306C (en) | 2003-12-31 |
Family
ID=12505327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102565.7A Expired - Fee Related CN1133306C (en) | 1996-02-26 | 1997-02-25 | High frequency radio signal receiving device for digit communication |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6122332A (en) |
| EP (1) | EP0792017B1 (en) |
| JP (1) | JP3627349B2 (en) |
| CN (1) | CN1133306C (en) |
| DE (1) | DE69721360T2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6920194B2 (en) * | 2001-05-29 | 2005-07-19 | Tioga Technologies, Ltd. | Method and system for detecting, timing, and correcting impulse noise |
| KR100381002B1 (en) * | 2001-05-31 | 2003-04-23 | 에스케이 텔레콤주식회사 | Apparatus for removing of pulse interpolation in wireless communication system |
| US7366258B2 (en) * | 2001-06-08 | 2008-04-29 | Broadcom Corporation | Chip blanking and processing in SCDMA to mitigate impulse and burst noise and/or distortion |
| GB0126067D0 (en) * | 2001-10-31 | 2001-12-19 | Zarlink Semiconductor Ltd | Method of and apparatus for detecting impulsive noise method of operating a demodulator demodulator and radio receiver |
| GB0214729D0 (en) * | 2002-06-26 | 2002-08-07 | Koninkl Philips Electronics Nv | Digital receiver arrangement and related method |
| FR2851860B1 (en) * | 2003-02-28 | 2005-04-15 | Suisse Electronique Microtech | METHOD OF MITIGATING THE INFLUENCE OF INTERFERENCE PRODUCED BY RADIO GUSTING RADIO TRANSMISSION SYSTEMS ON UWB COMMUNICATIONS |
| US8253624B2 (en) * | 2003-06-02 | 2012-08-28 | Motorola Mobility Llc | Detection and reduction of periodic jamming signals in GPS receivers and methods therefor |
| EP1566935B1 (en) * | 2004-02-19 | 2012-07-25 | St Microelectronics S.A. | Device and method for suppression of impulsive interferences in a signal |
| JP4514545B2 (en) * | 2004-07-30 | 2010-07-28 | アイコム株式会社 | Noise detector, radio, and noise detection method |
| JP2006050018A (en) * | 2004-07-30 | 2006-02-16 | Icom Inc | Noise blanker and radio device |
| WO2007049552A1 (en) * | 2005-10-25 | 2007-05-03 | Matsushita Electric Industrial Co., Ltd. | Audio signal demodulation device |
| JP4732231B2 (en) * | 2006-05-16 | 2011-07-27 | パイオニア株式会社 | Mute circuit |
| US7924936B2 (en) * | 2006-06-19 | 2011-04-12 | Xg Technology, Inc. | System and method for wave damping |
| US7599674B2 (en) * | 2006-07-17 | 2009-10-06 | Pine Valley Investments, Inc. | Overload protection for receiver front end |
| TWI387320B (en) * | 2008-08-15 | 2013-02-21 | Novatek Microelectronics Corp | Apparatus and method for filtering image signal noise |
| JP5515032B2 (en) * | 2009-06-24 | 2014-06-11 | 国立大学法人京都大学 | Noise detection method, noise detection device, simulation method, simulation device, and communication system |
| CN101931794B (en) * | 2009-06-25 | 2012-05-23 | 启碁科技股份有限公司 | Band switching circuit and relative satellite television system thereof |
| US10128905B2 (en) * | 2012-06-26 | 2018-11-13 | Alarm.Com Incorporated | Method and system for impulsive noise classification and mitigation |
| ES2540155B2 (en) * | 2013-12-05 | 2015-10-19 | Universidade De Vigo | Impulse noise reduction method in telecommunication systems by extending the receiver band |
| CN104022761B (en) * | 2014-05-23 | 2016-11-09 | 中国电子科技集团公司第四十一研究所 | A kind of method of testing of pulse-modulated signal |
| CN107534632B (en) | 2015-08-31 | 2020-07-10 | 旭化成微电子株式会社 | Demodulation device |
| WO2017038536A1 (en) * | 2015-08-31 | 2017-03-09 | 旭化成エレクトロニクス株式会社 | Demodulator |
| TWI593238B (en) * | 2016-05-17 | 2017-07-21 | 晨星半導體股份有限公司 | Impulsive noise detection circuit and method thereof |
| TWI640196B (en) * | 2017-04-12 | 2018-11-01 | 晨星半導體股份有限公司 | Circuit applied to display apparatus and associated signal processing method |
| CN108732433A (en) * | 2018-07-24 | 2018-11-02 | 华讯方舟科技有限公司 | Microwave converter noise figure detecting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466129A (en) * | 1982-05-06 | 1984-08-14 | Motorola, Inc. | Noise reducing circuitry for single sideband receivers |
| EP0103385B1 (en) * | 1982-07-30 | 1987-04-08 | Victor Company Of Japan, Limited | Circuit arrangement for reconstructing noise-affected signals |
| US4528678A (en) * | 1983-07-05 | 1985-07-09 | Westinghouse Electric Corp. | Nonlinear noise reduction apparatus with memory |
| US4965854A (en) * | 1988-11-30 | 1990-10-23 | General Electric Company | Noise blanker with continuous wave interference compensation |
| US5212827A (en) * | 1991-02-04 | 1993-05-18 | Motorola, Inc. | Zero intermediate frequency noise blanker |
| US5210518A (en) * | 1991-05-10 | 1993-05-11 | Echelon Corporation | Apparatus and method for reducing errors in data caused by noise |
| US5901172A (en) * | 1997-06-11 | 1999-05-04 | Multispectral Solutions, Inc. | Ultra wideband receiver with high speed noise and interference tracking threshold |
-
1996
- 1996-02-26 JP JP03771996A patent/JP3627349B2/en not_active Expired - Fee Related
-
1997
- 1997-02-06 US US08/796,739 patent/US6122332A/en not_active Expired - Lifetime
- 1997-02-06 DE DE69721360T patent/DE69721360T2/en not_active Expired - Lifetime
- 1997-02-06 EP EP97300760A patent/EP0792017B1/en not_active Expired - Lifetime
- 1997-02-25 CN CN97102565.7A patent/CN1133306C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69721360D1 (en) | 2003-06-05 |
| US6122332A (en) | 2000-09-19 |
| EP0792017A2 (en) | 1997-08-27 |
| EP0792017A3 (en) | 1998-02-25 |
| JPH09232977A (en) | 1997-09-05 |
| CN1163527A (en) | 1997-10-29 |
| JP3627349B2 (en) | 2005-03-09 |
| EP0792017B1 (en) | 2003-05-02 |
| DE69721360T2 (en) | 2004-04-08 |
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| C06 | Publication | ||
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Granted publication date: 20031231 Termination date: 20110225 |